A new Bulletin Board entry provides the official TM response to the question "Why isn't there a credit for 19" wheels in the performance package?" Why isn wheels in the Performance Package? | Forums | Tesla Motors Here is the text: ************** WHY ISN'T THERE A CREDIT FOR 19" WHEELS IN THE PERFORMANCE PACKAGE? [email protected] | NOVEMBER 24, 2012 The Performance Package was priced assuming a 19" wheel. Here is how we arrived at Performance pricing: Base 85 kWh Model S $77,400 Performance Drive Unit $10,000 Upgraded Interior and Treatments $3,500 Active Air Suspension $1,500 Total $92,400 The $10,000 Performance Drive unit includes upgraded drive components, hardware and software. The $3,500 Upgraded Interior includes all items in the $1,500 Nappa Leather Interior package, plus an Alcantara headliner ($1,900 on a Porsche Panamera), additional leather treatments and Alcantara seat bolsters ($600), Carbon Fiber décor option ($500 on Audi S7), and contrast color piping on seats ($200). This package rolls up to between $4,200 and $4,700 (depending upon if you choose the Carbon Fiber Décor on not), but was included in the Performance Package at $3,500. The $92,400 price assumed a 19" wheel. However, we wanted our very early reservation holders to have the option to choose their favorite wheel as part of the Performance Package at no additional cost. *************** To say the least, this explanation would seem to be at odds with the fact that the 21" wheel and its corresponding high-performance tires seemed to be designed for and/or were specific to the Performance version, not to mention that the grey 21s were originally exclusive to the performance version. Does anyone else find this explanation implausible, or at least problematic?